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Anti-corrosive properties of polyvinyl-alcohol for carbon steel in hydrochloric acid media: Electrochemical and thermodynamic investigation
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نویسنده
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alaoui k. ,el kacimi y. ,galai m. ,touir r. ,dahmani k. ,harfi a. ,ebn touhami m.
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منبع
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journal of materials and environmental science - 2016 - دوره : 7 - شماره : 7 - صفحه:2389 -2403
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چکیده
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The corrosion and inhibitor adsorption processes in carbon steel/polyvinyl-alcohol/hydrochloric acid systems was studied at different temperatures in the range from 298 to 328 k by a series of known techniques such as weight loss,polarization and electrochemical impedance spectroscopy (eis). it was found that the studied compounds exhibit a very good performance as inhibitors for carbon steel corrosion in 1 m hcl. results show that the inhibition efficiency increases with inhibitors concentration and depends on its temperature and immersion time. it has been determined that the adsorption for the studied inhibitors on carbon steel complies with the langmuir adsorption isotherm at all studied temperatures. the kinetic and thermodynamic parameters for carbon steel corrosion and inhibitor adsorption,respectively,were determined and discussed. on the bases of thermodynamic adsorption parameters,comprehensive adsorption (physisorption and chemisorption) for the studied inhibitors on carbon steel surface was suggested.
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کلیدواژه
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Adsorption isotherm; Carbon steel; Corrosion and inhibition; EIS; Hydrochloric acid; Polyvinyl-Alcohol
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آدرس
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laboratory of materials engineering and environment: modeling and application,faculty of science,university ibn tofail,bp. 133-14000,kenitra, Morocco, laboratory of materials engineering and environment: modeling and application,faculty of science,university ibn tofail,bp. 133-14000,kenitra, Morocco, laboratory of materials engineering and environment: modeling and application,faculty of science,university ibn tofail,bp. 133-14000,kenitra, Morocco, laboratory of materials engineering and environment: modeling and application,faculty of science,university ibn tofail,bp. 133-14000,kenitra,morocco,centre régional des métiers de l'éducation et de la formation (crmef),avenue allal al fassi,madinat al irfane,bp 6210,rabat, Morocco, laboratory of materials,electrochemistry and environment,faculty of science,ibn tofail university,kénitra, Morocco, laboratory of polymers,radiation and environment,faculty of science,university ibn tofail,kenitra, Morocco, laboratory of materials engineering and environment: modeling and application,faculty of science,university ibn tofail,bp. 133-14000,kenitra, Morocco
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Authors
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